Which statements are true the ordered pair (1, 2) and the system of equations? y=-2x +4
7 x - 2y 3
Select each correct answer
When (1, 2) is substituted into the second equation, the equations false.
The ordered pair (1, 2) is a solution to the system of linear equations.
When (1, 2) is substituted into the first equation, the equation is true.
The ordered pair (1, 2) is not a solution to the system of linear equations.
When (1, 2) is substituted into the second equation, the equation is true.
When (1, 2) is substituted into the first equation, the equation is false.

step-by-step explanation:

900 degrees

step-by-step explanation:

id

step-by-step explanation:

idk

idk

i know the way

and

idk

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.